If you need a way to increase resistance during exercise without the cost and bulk of traditional weights Natural Fitness Resistance Tubes offer an affordable, portable alternative. Our functional, break-resistant dipped rubber tubes are perfect for use in the gym, at home or while traveling. A wide variety of core, upper and lower body resistance exercises can be performed using these tubes and the possibilities expand when used in tandem with other Natural Fitness products. The soft comfort foam covered quick change handles provide a secure grip, are removable and can be used with all levels of these resistance tubes. Available in 4 resistance levels. 4 ft long.